The Razor has lot going for it but to answer your question - I would still go Rise when:
1. Wind is seriously cranking - Rise is amazing here, tremendous range and wicked fast turns/loops in the 10m and smaller sizes. Were talking 8 m conditions.
2. Gusty conditions - Tons of depower just by sheeting out is a major strength and noticeably different from the Razor…. Not that the Razor is a lofting waiting to happen, it just isn’t designed to depower the way the Rise does.
3. Need some extra-upwind ability - If you are constantly being offset by several knots of current, I think the Rise goes upwind slightly better than the Razor. The Razor goes up wind very well, especially for how deep it sits in the window. But the Rise is category killer in this department and goes upwind like a buzz saw.
4. Massive Boosting - I like jumping the Razor but so far it has not ripped me of the water as hard or as high as the Rise.
5. General Free Riding - Rise is hard to beat in this category. Low bar pressure, ease of use, superb performance - if I am not planning on unhooking a lot or craving more yank in the loops, the Rise is ideal.
I have both Rises and Razors - and plan to keep both. Reading all the reviews you could come away with the impression that no-one should buy the Rise as the Razor is so clearly superior. It is not not the the Razor is better - is is just different - a C/SLE hybrid that has a a lot of C features in it. This plays out when you want low end grunt, direct feel, more power in loops/turns and improved unhooking.
The Rise is still the best free ride kite I have ridden in terms of range, power, de-power, speed and boost - and makes for a very dynamic and high performance ride - which is why there will still be and 8 and 10 mixed in with my Razors.